Impact of haemoglobin A1c on wound infection in patients with diabetes with implanted synthetic graft.

OBJECTIVE: The aim of this study was to assess the relationship between haemoglobin A1c (HbA1c) values and operative wound infection. METHOD: During the period from 2013-2016, consecutive patients with type 2 diabetes were prospectively evaluated. Data were retrospectively analysed. All included patients were admitted for an elective surgical procedure, requiring the use of prosthetic graft in a groin wound. The patients were divided into two groups according to their preoperative HbA1c values. The main outcome was groin wound infection. The association between preoperative long-term glycoregulation and wound infection was evaluated, as well as the impact of postoperative glycaemic values, regardless of the level of HbA1c. RESULTS: Of the 93 participating patients, wound infection occurred in 20 (21.5%). Wound infection occurred in 28.2% of patients with uncontrolled diabetes (HbA1c >7%) and 16.7% of patients with controlled diabetes (HbA1c <7%); however, the difference did not reach statistical significance (p=0.181). In regression modelling, operative time (p=0.042) was a significant predictor of wound infection, while patients' age (p=0.056) was on the borderline of statistical significance. Females had a higher probability for wound infection (odds ratio (OR): 1.739; 95% confidence interval (CI):0.483-6.265), but there was no statistical significance (p=0.397). Patients with elevated levels of HbA1c had a higher chance of wound infection compared with patients with controlled diabetes (OR: 2.243; 95% CI: 0.749-6.716), nevertheless, this was not statistically significant (p=0.149). CONCLUSION: We found no statistically significant correlation between elevated values of preoperative HbA1c and postoperative groin wound infection.

Direct Ischemic Postconditioning After Carotid Endarterectomy in the Prevention of Postoperative Cerebral Ischemic Complications-Observational Case-Control Study.

INTRODUCTION: Ischemic postconditioning (IPCT) represents one of the several therapeutic strategies to attenuate ischemic reperfusion injury (IR) after carotid endarterectomy (CEA). We here present the first in-human study of IPCT in carotid surgery. METHODS: The study represents an observational case-control study, with the data collected in our Institution carotid database. From December 2015 to December 2020, a total of 300 patients were included in our study; IPCT group consisted of 148 patients in whom ischemic postconditioning was performed while control group consisted of 152 patients in whom IPCT was not performed. Indications for IPCT technique were: severe unilateral internal carotid artery (ICA) stenosis (>90%), severe bilateral ICA stenosis (>80%), severe ICA stenosis (>80%) with contralateral ICA occlusion and ICA subocclusion. IPCT was performed by applying 6 cycles of 30 sec reperfusion (declamping of ICA)/30 sec ischemia (clamping of ICA) after finishing the procedure and initial declamping. Two groups of patients were compared in terms of occurrence of intrahospital and early postoperative stroke, TIA (transient ischemic attack) and neurologic morbidity. RESULTS: Cumulative incidence of intrahospital postoperative stroke or TIA was significantly higher in the control group (5.3% vs 0.7%, P = .036). According to carotid plaque characteristics, patients in the IPCT group had significantly more frequent presence of heterogenous plaque, as well as ulcerated plaque, which was associated with the absence of postoperative stroke and significantly lower cumulative rate of TIA/stroke when compared to the control group (43.9% vs 8% and 47.3% vs 1.5%). During the follow-up period of 1 month after the surgery, there were no cases of stroke, TIA and deaths due to neurological causes in both groups of patients. CONCLUSION: Our results showed that IPCT significantly reduced the incidence of postoperative cerebral ischemic complications after CEA in high-risk patients for IR injury when compared to the control group.

Heart surgery in patients on chronic dialysis.

INTRODUCTION: Patients on dialysis for end-stage renal failure are subjected to cardiac surgery with increasing frequency. End-stage renal failure is known to be an important risk factor for complications of cardiac operations performed with cardiopulmonary bypass. The aim of this study was to determine the impact of preoperative clinical status and operative variables on perioperative morbidity and mortality in hemodialysis-dependent patients subjected to a cardiac surgery. MATERIAL AND METHODS: The following operative variables were examined: urgency, type and duration of surgery and duration of extracorporeal circulation. The study is a retrospective analysis of consecutive patients with end-stage renal failure dependent on maintenance hemodialysis who underwent cardiac surgery during four years. RESULTS: The study included 46 patients. Operations performed included isolated coronary artery bypass grafting (CABG, n = 24), valve surgery alone (n = 6), and combined valve surgery or coronary artery bypass grafting and valve surgery (n = 16). The perioperative mortality rate was 13% with four fatal outcomes in patients who had undergone combined cardiac surgery. We found age > 70 years, preoperative New York Heart Association class IV, preoperative anemia, combined surgery and emergent surgery to be associated with a higher relative risk for perioperative death. CONCLUSION: Patients on dialysis have an increased morbidity and mortality following cardiac surgery; however, we believe that end-stage renal failure should not be regarded as a contraindication to cardiac surgery or cardiopulmonary bypass.